<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
  <el-header>
    <div>
      <img src="../assets/heima.png" alt="">
      <span>电商后台管理系统</span>
    </div>
    <el-button type="info" @click="logout">退出</el-button>
    </el-header>
  <!-- 页面主体 -->
  <el-container>
    <!-- 侧边栏 -->
    <el-aside :width="iscollapse ? '64px' : '200px'">
      <!-- 侧边栏菜单组 -->
      <div class="toggle-button" @click="toggleCollapse">
        |||
      </div>
        <el-menu
      background-color="#333744"
      text-color="#fff"
      active-text-color="#409EFF"
      unique-opened
      :collapse="iscollapse"
      :collapse-transition="false"
      router
      :default-active="activePath"
      >
      <!-- 一级菜单 -->
      <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
        <!-- 一级菜单的模板区域 -->
        <template slot="title">
          <!-- 图标 -->
          <i :class="iconsObj[item.id]"></i>
          <!-- 文本 -->
          <span>{{item.authName}}</span>
        </template>
        <!-- 二级菜单 -->
        <el-menu-item :index="'/' + subItem.path" v-for="subItem in item.children" 
        :key="subItem.id"
        @click="saveNavState('/' +subItem.path)"
        >
           <template slot="title">
          <!-- 图标 -->
          <i class="el-icon-menu"></i>
          <!-- 文本 -->
          <span>{{subItem.authName}}</span>
        </template>
        </el-menu-item>
      </el-submenu>
    </el-menu>
    </el-aside>
    <!-- 右侧内容主体 -->
    <el-main>
      <!-- 路由占位符 -->
      <router-view></router-view>
    </el-main>
  </el-container>
</el-container>
</template>

<script>
export default {
  data(){
    return{
      //左侧菜单数据
      menulist: [],
      iconsObj:{
        '125':'iconfont icon-users',
        '103':'iconfont icon-tijikongjian',
        '101':'iconfont icon-shangpin',
        '102':'iconfont icon-danju',
        '145':'iconfont icon-baobiao'
      },
      //是否折叠
      iscollapse: false,
      //被激活的链接地址
      activePath:''
    }
  },
  created(){
    this.getMenuList()
    this.activePath=window.sessionStorage.getItem('activePath')
    
  },
  methods: {
    logout() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    //获取所有的菜单
   async getMenuList(){
      const {data:res} =await this.$http.get('menus')
      if(res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menulist =res.data
      console.log(res);
    },
    //点击按钮，切换菜单折叠与展开
    toggleCollapse(){
      this.iscollapse = ! this.iscollapse
    },
    //保存链接的激活状态
    saveNavState(activePath){
      window.sessionStorage.setItem('activePath',activePath)
      this.activePath =activePath
    }
  },
}
</script>

<style lang="less" scoped>
.home-container{
  height: 100%;
}
.el-header{
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left:0;
  align-items: center;
  color:#fff;
  font-size: 20px;
  >div{
    display: flex;
    align-items: center;
    span{
      margin-left: 15px;
    }
  }
}
.el-aside{
  background-color: #333744;
  .el-menu{
    border-right:none;
  }
}
.el-main{
  background-color: #eaedf1;
}
.iconfont{
  margin-right: 10px;
}
.toggle-button{
  background-color: #4A5064;
  font-size: 10px;
  line-height: 24px;
  color:#fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>